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United States Patent | 5,163,546 |
Kawada ,   et al. | November 17, 1992 |
An AC magnetic floating apparatus for floating and conveying a conductive floating body of paramagnetic or nonmagnetic metallic material above a line of AC electromagnets, includes a single-phase AC current source having a first frequency for floating the floating body, a three-phase AC current source having a second frequency for conveying the floating body, an adder for adding AC current from the two current source and a supply circuit for supplying the added Ac currents to the line of AC electromagnets. The floating body can be stopped at a desired position exactly with efficient conveyance.
Inventors: | Kawada; Noriyuki (Hiroshima, JP); Morii; Shigeki (Hiroshima, JP); Nakashima; Motomi (Hiroshima, JP); Yamada; Jin (Hiroshima, JP); Kaneko; Akitami (Hiroshima, JP) |
Assignee: | Mitsubishi Jukogyo Kabushiki Kaisha (Tokyo, JP) |
Appl. No.: | 749306 |
Filed: | August 23, 1991 |
Oct 12, 1990[JP] | 2-272364 |
Current U.S. Class: | 198/619; 104/282 |
Intern'l Class: | B65G 035/00 |
Field of Search: | 104/282,283 198/619 |
3858522 | Jan., 1975 | Maki | 104/282. |
3867886 | Feb., 1975 | Maki | 104/282. |
4013906 | Mar., 1977 | Eastham | 104/282. |
4055123 | Oct., 1977 | Heidelberg | 104/282. |
Foreign Patent Documents | |||
0130926 | Jun., 1987 | JP | 198/619. |
0299121 | Dec., 1989 | JP | 198/619. |
Patent Abstracts Of Japan, unexamined applications, M field, vol. 10, No. 333, Nov. 12, 1986, Kokai-No. 61-136 819 (Shinko Electric Co. Ltd). Patent Abstract of Japan, unexamined applications, M field, vol. 11, No. 278, Sep. 9 ,1987, Kokai-No. 62-79 122 (Toshiba Corp). Patent Abstracts Of Japan, unexamined applications, M field, vol. 11, No. 278, Jan. 22, 1981, Kokai-No. 55-140 424 (Ishikawa Jima Harima Yukogyo K K). |